package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import com.sky.vo.UserLoginVO;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.StringUtils;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;
import java.util.logging.Logger;

@Service
public class UserServiceImpl implements UserService {
    @Autowired
    private WeChatProperties properties;
    @Autowired
    private UserMapper userMapper;

    private static final String WX_LOGIN_URL = "https://api.weixin.qq.com/sns/jscode2session";
    /**
     * wx用户登录
     *
     * @return
     */
    @Override
    public User wxLogin(UserLoginDTO loginDTO) {
        //调用微信接口服务，获得当前微信用户的openid
        JSONObject jsonObject = getJsonObject(loginDTO);
        String openid = jsonObject.getString("openid");
        //判断openID是否为空，如果为空表示登录失败，抛出业务
        if(StringUtils.isEmpty(openid)){
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }
        //判断当前用户是否为新用户
        User user = userMapper.getUserById(openid);
        //如果是新用户，自动完成注册
        if (user == null) {
            user=User.builder().openid(openid).createTime(LocalDateTime.now()).build();
            userMapper.insert(user);
        }
        //返回用户对象
        return user;
    }

    private JSONObject getJsonObject(UserLoginDTO loginDTO) {
        Map<String, String> map = new HashMap<>();
        map.put("appid", properties.getAppid());
        map.put("secret", properties.getSecret());
        map.put("js_code", loginDTO.getCode());
        map.put("grant_type", "authorization_code");
        String json = HttpClientUtil.doGet(WX_LOGIN_URL, map);

        JSONObject jsonObject = JSON.parseObject(json);
        return jsonObject;
    }
}
